CN106881618B - Two-axis linkage fast knife servo device - Google Patents
Two-axis linkage fast knife servo device Download PDFInfo
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- CN106881618B CN106881618B CN201710217569.7A CN201710217569A CN106881618B CN 106881618 B CN106881618 B CN 106881618B CN 201710217569 A CN201710217569 A CN 201710217569A CN 106881618 B CN106881618 B CN 106881618B
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- 239000000919 ceramic Substances 0.000 claims abstract description 126
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- 230000003287 optical effect Effects 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 6
- 230000004044 response Effects 0.000 abstract description 6
- 230000001133 acceleration Effects 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 description 10
- 230000009471 action Effects 0.000 description 7
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004579 marble Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000012788 optical film Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000007516 diamond turning Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2705/00—Driving working spindles or feeding members carrying tools or work
- B23Q2705/10—Feeding members carrying tools or work
- B23Q2705/102—Feeding members carrying tools or work for lathes
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- Machine Tool Units (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to a two-axis linkage fast knife servo device which comprises a frame, a detachable flexible connecting piece, a fast knife servo knife rest, first piezoelectric ceramics, second piezoelectric ceramics and a knife installation piece, wherein one end of the detachable flexible connecting piece is connected with the frame, the other end of the detachable flexible connecting piece is connected with the fast knife servo knife rest, the first piezoelectric ceramics drives the fast knife servo knife rest to reciprocate along a first direction, the knife installation piece is installed on the fast knife servo knife rest, and the second piezoelectric ceramics drives the knife installation piece to reciprocate along a second direction. The fast knife servo device with the two-axis linkage can meet the processing requirements of high frequency response, high acceleration and high precision, and can process an optical free-form surface with a micro-nano array structure.
Description
Technical Field
The invention relates to the technical field of fast knife servo devices, in particular to a two-axis linkage fast knife servo device.
Background
The optical film is an important part in the backlight module of the liquid crystal display. In general, an optical film is processed using a diamond turning method based on Fast Tool Servo (FTS). However, the conventional FTS device is a uniaxial linear FTS device, and cannot meet the requirement of processing an optical free-form surface.
Disclosure of Invention
In view of this, it is necessary to provide a two-axis linked fast-cutter servo device which can be used for processing an optical free-form surface, in order to solve the problem that the optical free-form surface cannot be processed.
The utility model provides a fast sword servo of diaxon linkage, its characterized in that, includes frame, dismantlement formula flexonics spare, fast sword servo knife rest, first piezoceramics, second piezoceramics and cutter mounting, the one end of dismantlement formula flexonics spare is connected the frame, the other end of dismantlement formula flexonics spare is connected fast sword servo knife rest, first piezoceramics drive fast sword servo knife rest is along first direction reciprocating motion, cutter mounting install in fast sword servo knife rest, second piezoceramics drive cutter mounting is along second direction reciprocating motion.
The two-axis linkage fast knife servo device is characterized in that the knife mounting piece is used for mounting a knife. The first piezoelectric ceramic drives the fast knife servo knife rest to reciprocate along a first direction, so that a knife arranged on the fast knife servo knife rest is driven to reciprocate along the first direction. The second piezoelectric ceramic drives the cutter mounting piece to reciprocate along the second direction, so that the cutter mounted on the cutter mounting piece is driven to reciprocate along the second direction. Under the action of the first piezoelectric ceramic and the second piezoelectric ceramic, the cutter can reciprocate in the first direction and the second direction, so that two-dimensional machining can be realized. The optical free-form surface has a micro-nano array structure. The piezoelectric ceramic FTS has the characteristics of high response frequency, high acceleration and high positioning precision, and the flexible hinge mechanism has the characteristics of no friction and high displacement resolution. Therefore, the two-axis linkage fast knife servo device can meet the processing requirements of high frequency response, high acceleration and high precision, and can process an optical free-form surface with a micro-nano array structure.
In one embodiment, the detachable flexible connection piece comprises more than one pair of first flexible hinges, one ends of the first flexible hinges are detachably connected with the frame, the other ends of the first flexible hinges are detachably connected with the fast knife servo knife rest, and each pair of first flexible hinges are respectively and correspondingly arranged on two sides of the fast knife servo knife rest. Therefore, the quick knife servo knife rest can be detached, and the two sides of the quick knife servo knife rest are uniformly stressed, so that the quick knife servo knife rest can smoothly and reliably reciprocate along the first direction.
In one embodiment, the setting direction of the first piezoelectric ceramic is parallel to the first direction, one end of the first piezoelectric ceramic is connected with the frame, and the other end of the first piezoelectric ceramic is connected with the fast knife servo knife rest. The frame is fixedly mounted to the floor, marble countertop or other hard and stable surface. The first piezoelectric ceramic increases or decreases in length under the action of the voltage, thereby pushing the first piezoelectric ceramic to reciprocate in the first direction.
In one embodiment, the fast knife servo knife rest is provided with a bridge type flexible hinge and a second flexible hinge, the bridge type flexible hinge is provided with a first bridge type flexible hinge end and a second bridge type flexible hinge end which is opposite to the first bridge type flexible hinge end along the first direction, the bridge type flexible hinge is provided with a third bridge type flexible hinge end and a fourth bridge type flexible hinge end which is opposite to the third bridge type flexible hinge end along the second direction, the third bridge type flexible hinge end is fixedly arranged on one side of the fast knife servo knife rest, one end of the second flexible hinge is connected with the other side of the fast knife servo knife rest, the other end of the second flexible hinge is connected with the fourth bridge type flexible hinge end, and the knife mounting piece is mounted on the fourth bridge type flexible hinge end;
the fast knife servo device with two-axis linkage further comprises a first driving rod and a second driving rod, one end of the first driving rod is installed at the first end of the bridge type flexible hinge, the other end of the first driving rod is provided with a first hook head, the first hook head is connected with one end of the second piezoelectric ceramic, one end of the second driving rod is installed at the second end of the bridge type flexible hinge, the other end of the second driving rod is provided with a second hook head, and the second hook head is connected with the other end of the second piezoelectric ceramic. When the second piezoelectric ceramic stretches, the first hook head and the second hook head are symmetrically distributed on the fast knife servo knife rest, so that the second piezoelectric ceramic is only subjected to the acting force in the first direction, but not subjected to the acting force in the second direction, and the coupling motion in the motion process is avoided.
Therefore, the length of the second piezoelectric ceramic is increased under the action of the driving voltage, so that the fourth end of the bridge type flexible hinge is pushed to reciprocate along the second direction, and the cutter can reciprocate along the second direction.
In one embodiment, the bridge type flexible hinge further comprises a first hinge rod, a second hinge rod, a third hinge rod and a fourth hinge rod, wherein the lengths of the first hinge rod, the second hinge rod, the third hinge rod and the fourth hinge rod are equal, one end of the first hinge rod is connected with the first end of the bridge type flexible hinge, the other end of the second hinge rod is connected with the first end of the bridge type flexible hinge, one end of the third hinge rod is connected with the second end of the bridge type flexible hinge, the other end of the third hinge rod is connected with the third end of the bridge type flexible hinge, one end of the fourth hinge rod is connected with the second end of the bridge type flexible hinge, the other end of the fourth hinge rod is connected with the fourth end of the bridge type flexible hinge, and an included angle between the first hinge rod and the second direction is larger than 45 degrees. According to the structural characteristics of the fast knife servo knife rest, the movement of the first end of the bridge type flexible hinge or the second end of the bridge type flexible hinge in the first direction drives the movement of the fourth end of the bridge type flexible hinge in the second direction. According to the lever displacement amplification principle, when the included angle between the first hinge rod and the second direction is larger than 45 degrees, the moving amount of the fourth end of the bridge type flexible hinge in the second direction is larger than the moving amount of the first end of the bridge type flexible hinge or the moving amount of the second end of the bridge type flexible hinge in the first direction. Therefore, the second piezoelectric ceramic realizes displacement amplification through the fast knife servo tool rest, so that the fast knife servo device with two-axis linkage has high-frequency large-stroke motion characteristics.
In one embodiment, a first gap is formed between the side surface of the second piezoelectric ceramic and the first driving rod, and a second gap is formed between the side surface of the second piezoelectric ceramic and the second driving rod. Because the first gap is formed between the second piezoelectric ceramic and the first driving rod, when the second piezoelectric ceramic and the first driving rod do relative motion, the second piezoelectric ceramic and the first driving rod do not interfere, so that the installation of the second piezoelectric ceramic is facilitated, and friction between the second piezoelectric ceramic and the first driving rod in the high-frequency motion process is avoided. Similarly, the second gap is convenient for the installation of the second piezoelectric ceramic, and the friction between the second piezoelectric ceramic and the second driving rod in the high-frequency motion process is avoided.
In one embodiment, the first piezoelectric ceramic is disposed coaxially with the second piezoelectric ceramic. Therefore, the second piezoelectric ceramic is symmetrically distributed in the middle of the fast knife servo knife rest through the first driving rod and the second driving rod, and the second piezoelectric ceramic only bears axial force and does not bear radial force along with the whole motion of the fast knife servo knife rest under the driving of the first piezoelectric ceramic, so that the service life of the second piezoelectric ceramic is prolonged.
In one embodiment, a pressure sensor is mounted at one end of the second piezoelectric ceramic, and the pressure sensor is in contact with an end face of the second piezoelectric ceramic. The pressure sensor is used for measuring the dynamic stress condition of the second piezoelectric ceramic, and through D/A conversion, the error analysis and compensation of the two-axis linkage fast knife servo device are convenient for a worker. The staff can also know the stress condition of the second piezoelectric ceramic through the pressure sensor, and the pressure sensor is used for researching and analyzing or adjusting the voltage applied to the second piezoelectric ceramic.
In one embodiment, the other end of the second piezoelectric ceramic is connected to the fast tool servo tool holder by a first fastener. Therefore, the second piezoelectric ceramic obtains pretightening force through the first fastener, the second piezoelectric ceramic is prevented from falling off in the motion process, and the rigidity of the bridge type flexible hinge can be adjusted in real time.
In one embodiment, the second direction is perpendicular to the first direction. In this way, the movement of the tool in the first direction does not affect the movement of the tool in the second direction. Under the independent action of the first piezoelectric ceramic and the second piezoelectric ceramic, the cutter is linked in the first direction and the second direction, and the fast cutter servo device with two-axis linkage realizes high-frequency reciprocating motion in 2 degrees of freedom.
Drawings
FIG. 1 is a schematic diagram of a two-axis linkage fast knife servo in an embodiment of the present invention;
FIG. 2 is an exploded view of a two-axis linked knife servo in accordance with an embodiment of the present invention;
fig. 3 is a cross-sectional view taken along line A-A in fig. 1.
100. Frame, 110, first direction, 120, second direction, 130, second fastener, 200, detachable flexible connection, 210, first flexible hinge, 300, fast knife servo knife holder, 310, second flexible hinge, 320, bridge flexible hinge, 321, bridge flexible hinge first end, 322, bridge flexible hinge second end, 323, bridge flexible hinge third end, 324, bridge flexible hinge fourth end, 325, first hinge rod, 326, second hinge rod, 327, third hinge rod, 328, fourth hinge rod, 400, first piezoceramic, 500, second piezoceramic, 501, first gap, 502, second gap, 503, first fastener, 600, knife mount, 700, knife, 810, first drive rod, 811, first hook, 820, second drive rod, 821, second hook, 830, pressure sensor, 841, third fastener 842, fourth fastener, 843, fifth fastener, 844, L plate, 845, sixth fastener.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only. The terms "first," "second," "third," "fourth," "fifth," and "sixth" in this disclosure do not denote a particular quantity or order, but rather are used for distinguishing between similar or corresponding terms.
As shown in fig. 1 and 2, a two-axis linkage fast knife servo comprises a frame 100, a detachable flexible connection member 200, a fast knife servo knife holder 300, a first piezoelectric ceramic 400, a second piezoelectric ceramic 500 and a knife mounting member 600. One end of the detachable flexible connection unit 200 is connected with the frame 100, and the other end of the detachable flexible connection unit 200 is connected with the fast knife servo knife rest 300. The first piezoelectric ceramic 400 drives the fast knife servo knife holder 300 to reciprocate in the first direction 110. The tool mount 600 is mounted to the fast tool servo tool holder 300. The second piezo-ceramic 500 drives the tool mount 600 to reciprocate in the second direction 120.
In the above-mentioned two-axis linked fast knife servo, the knife mounting member 600 is used for mounting the knife 700. The tool mount 600 may be a tool mounting plate, a tool mounting block, or a tool mounting frame. The tool 700 may alternatively be a diamond tool. The frame 100 is fixedly mounted to the floor, marble countertop, or other hard and stable surface. The first piezoelectric ceramic 400 drives the fast knife servo knife holder 300 to reciprocate in the first direction 110, thereby driving the knife 700 mounted on the fast knife servo knife holder 300 to reciprocate in the first direction 110. The second piezoelectric ceramic 500 drives the tool mount 600 to reciprocate in the second direction 120, thereby driving the tool 700 mounted on the tool mount 600 to reciprocate in the second direction 120. Under the respective actions of the first piezoelectric ceramic 400 and the second piezoelectric ceramic 500, the tool 700 can reciprocate in the first direction 110 and the second direction 120, and the tool 700 can simultaneously realize high-frequency reciprocation or oscillation along two movement axes with respect to the workpiece, thereby enabling two-dimensional processing. The optical free-form surface has a micro-nano array structure. The piezoelectric ceramic FTS has the characteristics of high response frequency, high acceleration and high positioning precision, and the flexible hinge mechanism has the characteristics of no friction and high displacement resolution. Therefore, the two-axis linkage fast knife servo device can meet the processing requirements of high frequency response, high acceleration and high precision, and can process an optical free-form surface with a micro-nano array structure.
Specifically, as shown in FIG. 1, the detachable flexible connection unit 200 includes more than one pair of first flexible hinges 210. One end of the first flexible hinge 210 is detachably connected to the frame 100, and the other end of the first flexible hinge 210 is detachably connected to the fast knife servo knife holder 300. Each pair of first flexible hinges 210 is disposed on two sides of the fast knife servo knife rest 300 respectively. The fast knife servo knife holder 300 is detachably connected to the frame 100 by a first flexible hinge 210. The force on both sides of the fast knife servo knife rest 300 is uniform, which is beneficial to the smooth and reliable reciprocating movement of the fast knife servo knife rest 300 along the first direction 110. In addition, both ends of the first flexible hinge 210 are detachably connected to the frame 100 and the fast-knife servo tool holder 300, respectively, so that the first flexible hinge 210 can be replaced by detaching the first flexible hinge 210 having a different thickness. In this manner, the worker changes the natural frequency of the first flexible hinge 210 and the stiffness of the first flexible hinge 210 by changing the first flexible hinge 210 to a different thickness.
Specifically, as shown in fig. 1, the first flexible hinge 210 may be selected to be a semicircular angle type flexible hinge. One end of the radius-type flexible hinge is mounted to the frame 100 by a second fastener 130. The second fastener 130 may be a cup head screw.
Specifically, as shown in fig. 1, the arrangement direction of the first piezoelectric ceramic 400 is parallel to the first direction 110. The arrangement direction of the first piezoelectric ceramic 400 is the longitudinal direction of the first piezoelectric ceramic 400 or the mounting direction of the first piezoelectric ceramic 400. One end of the first piezoelectric ceramic 400 is connected to the frame 100, and the other end of the first piezoelectric ceramic 400 is connected to the fast knife servo knife holder 300. Under the voltage, the length of the first piezoelectric ceramic 400 increases or decreases, thereby pushing the fast knife servo knife holder 300 to reciprocate in the first direction 110.
It will be appreciated that the direction of arrangement of the first piezoelectric ceramic may alternatively be parallel to the second direction. The first piezoelectric ceramics are arranged at two ends of the fast knife servo knife rest. The other two ends of the fast knife servo knife rest are respectively connected with the frame and the fast knife servo knife rest. Therefore, under the action of the driving voltage, the length of the first piezoelectric ceramic is increased or reduced along the second direction, so that the two ends of the fast knife servo knife rest are driven to move, the other two ends of the fast knife servo knife rest are driven to move in the first direction, and the cutter is driven to reciprocate along the first direction.
On the basis of the foregoing embodiments, as shown in fig. 1 and 2, the fast knife servo knife holder 300 is provided with a second flexible hinge 310 and a bridge flexible hinge 320. The bridge type flexible hinge 320 is provided with a bridge type flexible hinge first end 321 and a bridge type flexible hinge second end 322 disposed opposite the bridge type flexible hinge first end 321 along the first direction 110. The bridge type flexible hinge 320 is provided with a bridge type flexible hinge third end 323 and a bridge type flexible hinge fourth end 324 disposed opposite to the bridge type flexible hinge third end 323 along the second direction 120. The bridge type flexible hinge third end 323 is fixedly arranged at one side of the fast knife servo knife rest 300. One end of the second flexible hinge 310 is connected to the other side of the fast knife servo knife holder 300 and the other end of the second flexible hinge 310 is connected to the bridge flexible hinge fourth end 324. The tool mount 600 is mounted to the bridge flexible hinge fourth end 324. Specifically, the knife mount 600 is mounted to the bridge flexible hinge fourth end 324 by a fifth fastener 843.
As shown in fig. 1 to 3, the above-mentioned two-axis linked fast knife servo device further includes a first driving lever 810 and a second driving lever 820. One end of the first drive rod 810 is mounted to the bridge flexible hinge first end 321. The other end of the first driving lever 810 is provided with a first hook 811. The first hook 811 is connected to one end of the second piezoelectric ceramic 500. Specifically, the first hook 811 is connected to one end of the second piezoelectric ceramic 500 by the sixth fastener 845. One end of the second drive rod 820 is mounted to the bridge flexible hinge second end 322. The other end of the second driving lever 820 is provided with a second hook 821. The second hook 821 is connected to the other end of the second piezoelectric ceramic 500.
When the second piezoelectric ceramic 500 is elongated, since the first hook 811 and the second hook 821 are symmetrically distributed on the fast knife servo tool holder 300, the second piezoelectric ceramic 500 is only subjected to the force in the first direction 110, but not to the force in the second direction 120, and the coupling motion during the motion is avoided. The second piezoelectric ceramic 500 is increased in length by the voltage, so that the second piezoelectric ceramic 500 applies a first tensile force to the first driving rod 810 through the first hook 811 and the second piezoelectric ceramic 500 applies a second tensile force to the second driving rod 820 through the second hook 821. The first tensile force is directed from bridge flexible hinge first end 321 to bridge flexible hinge second end 322. The second tensile force is directed from bridge flexible hinge second end 322 toward bridge flexible hinge first end 321. Accordingly, the bridge flexible hinge first end 321 and the bridge flexible hinge second end 322 move toward each other, such that the bridge flexible hinge third end 323 and the bridge flexible hinge fourth end 324 move away from each other, driving the cutter mount 600 to perform the feeding motion in the second direction 120.
In this way, the second piezoelectric ceramic 500 increases or decreases the length of the second piezoelectric ceramic 500 under the voltage, so as to push the bridge flexible hinge fourth end 324 to reciprocate along the second direction 120, thereby enabling the cutter 700 to reciprocate along the second direction 120. Wherein the fast knife servo knife rest 300 is integrally formed.
Specifically, as shown in fig. 2, the first drive rod 810 is mounted to the bridge flexible hinge first end 321 by a third fastener 841. The second drive rod 820 is mounted to the bridge flexible hinge second end 322 by a fourth fastener 842. The third fastener 841 and/or the fourth fastener 842 may alternatively be a cup head screw. The first driving lever 810 and the second driving lever 820 are disposed opposite to each other. The first driving rod 810 is mounted to the bridge type flexible hinge 320 from an upper portion of the second piezoelectric ceramic 500. The second driving rod 820 is mounted to the bridge type flexible hinge 320 from the lower portion of the second piezoelectric ceramic 500.
Specifically, as shown in fig. 1 and 2, the fast knife servo knife holder 320 further includes a first hinge bar 325, a second hinge bar 326, a third hinge bar 327, and a fourth hinge bar 328, which are equal in length. One end of the first hinge rod 325 is connected to the bridge type flexible hinge first end 321, and the other end of the first hinge rod 325 is connected to the bridge type flexible hinge third end 323. One end of the second hinge rod 326 is connected to the bridge type flexible hinge first end 321, and the other end of the second hinge rod 326 is connected to the bridge type flexible hinge fourth end 324. One end of the third hinge rod 327 is connected to the bridge type flexible hinge second end 322, and the other end of the third hinge rod 327 is connected to the bridge type flexible hinge third end 323. One end of the fourth hinge rod 328 is connected to the bridge flexible hinge second end 322 and the other end of the fourth hinge rod 328 is connected to the bridge flexible hinge fourth end 324. The first hinge rod 325 is angled at greater than 45 degrees from the second direction 120.
Since the first hinge rod 325, the second hinge rod 326, the third hinge rod 327 and the fourth hinge rod 328 have equal lengths, the bridge type flexible hinge 320 has a symmetrical structure, so that the displacement coupling can be eliminated, and the displacement amount of the second piezoelectric ceramic 500 in the first direction 110 on the cutter 700 can be avoided.
Depending on the structural characteristics of the bridge flexible hinge 320, movement of either the bridge flexible hinge first end 321 or the bridge flexible hinge second end 322 in the first direction 110 will cause movement of the bridge flexible hinge fourth end 324 in the second direction 120. According to the lever displacement amplification principle, when the angle between the first hinge rod 325 and the second direction 120 is greater than 45 degrees, the movement amount of the fourth end 324 of the bridge type flexible hinge in the second direction 120 is greater than the movement amount of the first end 321 or the second end 322 of the bridge type flexible hinge in the first direction 110. For example, when the first hinge rod 325 is at an angle of 72 degrees to the second direction 120, the bridge flexible hinge fourth end 324 moves 6.16 times the distance that the bridge flexible hinge first end 321 moves. In this way, the second piezoelectric ceramic 500 realizes displacement amplification through the bridge type flexible hinge 320, so that the cutter 700 can perform high-frequency large-displacement motion.
On the basis of the foregoing embodiment, as shown in fig. 3, a first gap 501 is provided between the side surface of the second piezoelectric ceramic 500 and the first driving rod 810. A second gap 502 is provided between the side of the second piezoelectric ceramic 500 and the second driving rod 820. Since the first gap 501 is formed between the second piezoelectric ceramic 500 and the first driving rod 810, when the second piezoelectric ceramic 500 and the first driving rod 810 move relatively, the second piezoelectric ceramic 500 and the first driving rod 810 do not interfere, which is convenient for mounting the second piezoelectric ceramic 500 and prevents the second piezoelectric ceramic 500 from rubbing the first driving rod 810 during the high-frequency movement. Similarly, the second gap 502 facilitates installation of the second piezoelectric ceramic 500, and prevents the second piezoelectric ceramic 500 from rubbing against the second driving rod 820 during high frequency motion.
Specifically, as shown in fig. 2 and 3, one end of the second piezoelectric ceramic 500 is mounted with a pressure sensor 830. The pressure sensor 830 is in contact with an end surface of the second piezoelectric ceramic 500. The pressure sensor 830 is used for measuring the dynamic stress condition of the second piezoelectric ceramic 500, and through D/a conversion, the operator can conveniently implement error analysis and compensation on the two-axis linkage fast knife servo device. The worker can also know the stress condition of the second piezoelectric ceramic 500 through the pressure sensor 830, and can be used for research analysis or adjustment of the voltage applied to the second piezoelectric ceramic 500.
Further, as shown in fig. 2 and 3, the other end of the second piezoelectric ceramic 500 is connected to the fast-knife servo knife holder 300 by a first fastener 503. In this way, the second piezoelectric ceramic 500 obtains a pretightening force through the first fastener 503, so as to avoid the second piezoelectric ceramic 500 from falling off during the movement process. In addition, by screwing the first fastener 503, the worker can change the pretightening force of the second piezoelectric ceramic 500, and the pretightening force is further converted into the resistance voltage of the second piezoelectric ceramic 500, thereby realizing the gapless movement of the second piezoelectric ceramic 500.
On the basis of the foregoing embodiment, as shown in fig. 1, the first piezoelectric ceramic 400 is coaxially disposed with the second piezoelectric ceramic 500. Because the second piezoelectric ceramic 500 is symmetrically distributed between the fast knife servo tool holder 300 through the first driving rod 810 and the second driving rod 820, the second piezoelectric ceramic 500 only bears axial force and does not bear radial force along with the whole movement of the fast knife servo tool holder 300 under the driving of the first piezoelectric ceramic 400, which is beneficial to prolonging the service life of the second piezoelectric ceramic 500.
In another embodiment of the present invention, the central axes of the first piezoelectric ceramic 400 and the second piezoelectric ceramic 500 may be perpendicular to each other. For example, the first piezoelectric ceramic 400 is disposed along the first direction 110 (see fig. 1). And the second piezoelectric ceramic 500 is disposed along the second direction 120. Specifically, one end of the second piezoelectric ceramic 500 is connected with the fast knife servo knife rest 300, and a movable block is mounted at the other end of the second piezoelectric ceramic 500. The moving block is mounted to the fast knife servo knife holder 300 by a flexible hinge. The tool mount 600 is mounted on a moving block. In this manner, the cutter 700 is also capable of independently reciprocating in the first direction 110 and the second direction 120 by the respective actions of the first piezoelectric ceramic 400 and the second piezoelectric ceramic 500.
Specifically, the first direction 110 and the second direction 120 are perpendicular, and movement of the tool 700 in the first direction 110 does not affect movement of the tool in the second direction 120, and the tool 700 is capable of reciprocating independently in the first direction 110 and the second direction 120.
Specifically, as shown in fig. 1, the first flexible hinge 210 is a rounded flexible hinge. The fillet type flexible hinge or the right angle type flexible hinge has smaller rigidity and larger flexibility than the hyperbolic type flexible hinge or the parabolic type flexible hinge, and has stronger strain capacity. Therefore, the two-axis linkage fast knife servo device has the characteristic of high frequency response. Similarly, the bridge type flexible hinge 320 may be a right angle type bridge type flexible hinge.
Specifically, as shown in fig. 2, the two-axis linked fast knife servo device further includes an L plate 844. The lateral end surface of the L-plate 844 is mounted to the fast-knife servo cartridge 300. The vertical end face of L plate 844 is equipped with the logical unthreaded hole. The light passing holes are used to measure the movement of the cutter 700. Specifically, the laser measures the motion signal of the tool 700 through the light passing hole. The fast knife servo device with two-axis linkage obtains workpiece processing feedback according to the motion signal of the knife 700, and further controls the applied voltage of the first piezoelectric ceramic 400 or the second piezoelectric ceramic 500 to improve the processing precision.
The traditional one-dimensional fast knife servo device can only do uniform feeding motion with one degree of freedom. The two-axis linkage fast knife servo device can move through two degrees of freedom, and can achieve the following advantages: firstly, realizing that the tool nose point changes along with the change of a curved surface, and passively calculating according to the arc position of the tool during processing to compensate the processing error of the tool; secondly, the dynamic stiffness and the static stiffness of the two-axis linkage fast knife servo device in the first direction or the second direction are ensured by virtue of a mechanical structure and the output of an actuator, and the second direction is increased to be an active motion direction, so that the displacement of the second direction can be controlled in a closed loop manner in the processing process, which is equivalent to the increase of the active stiffness in the second direction; thirdly, the two-axis linked fast knife servo device can be matched with a machine tool, and high-frequency motion consistent with the working frequency of the machine tool is performed in the X direction and the Z direction of the machine tool, so that the actual cutting point can be actively changed according to the arc radius of a cutter, and a high-precision free-form surface microstructure is obtained.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The utility model provides a quick cutter servo device of diaxon linkage, its characterized in that includes frame, dismantlement formula flexonics spare, quick cutter servo knife rest, first piezoceramics, second piezoceramics and cutter mounting piece, the one end of dismantlement formula flexonics spare is connected the frame, the other end of dismantlement formula flexonics spare is connected the quick cutter servo knife rest, dismantlement formula flexonics spare includes more than one pair of first flexible hinge, the one end detachably of first flexible hinge is connected the frame, the other end detachably of first flexible hinge is connected the quick cutter servo knife rest, every pair of first flexible hinge corresponds respectively set up in the both sides of quick cutter servo knife rest, first piezoceramics drive quick cutter servo knife rest is along the reciprocating motion of first direction, cutter mounting piece is installed in quick cutter servo knife rest, second piezoceramics drive cutter mounting piece is along the reciprocating motion of second direction;
the quick knife servo knife rest is provided with a bridge type flexible hinge and a second flexible hinge, the bridge type flexible hinge is provided with a bridge type flexible hinge third end and a bridge type flexible hinge fourth end which is opposite to the bridge type flexible hinge third end in the second direction, the bridge type flexible hinge third end is fixedly arranged on one side of the quick knife servo knife rest, one end of the second flexible hinge is connected with the other side of the quick knife servo knife rest, the other end of the second flexible hinge is connected with the bridge type flexible hinge fourth end, and the knife mounting piece is mounted on the bridge type flexible hinge fourth end.
2. The two-axis linkage fast knife servo device according to claim 1, wherein the arrangement direction of the first piezoelectric ceramic is parallel to the first direction, one end of the first piezoelectric ceramic is connected with the frame, and the other end of the first piezoelectric ceramic is connected with the fast knife servo knife rest.
3. The two-axis linked knife servo of claim 1 wherein the bridge flexible hinge has a bridge flexible hinge first end and a bridge flexible hinge second end disposed opposite the bridge flexible hinge first end along the first direction.
4. The two-axis linkage fast knife servo device according to claim 3, further comprising a first driving rod and a second driving rod, wherein one end of the first driving rod is mounted at the first end of the bridge type flexible hinge, a first hook is arranged at the other end of the first driving rod, the first hook is connected with one end of the second piezoelectric ceramic, one end of the second driving rod is mounted at the second end of the bridge type flexible hinge, a second hook is arranged at the other end of the second driving rod, and the second hook is connected with the other end of the second piezoelectric ceramic.
5. The two-axis linkage fast knife servo device according to claim 4, wherein the bridge type flexible hinge further comprises a first hinge rod, a second hinge rod, a third hinge rod and a fourth hinge rod which are equal in length, one end of the first hinge rod is connected with the first end of the bridge type flexible hinge, the other end of the first hinge rod is connected with the third end of the bridge type flexible hinge, one end of the second hinge rod is connected with the first end of the bridge type flexible hinge, the other end of the second hinge rod is connected with the fourth end of the bridge type flexible hinge, one end of the third hinge rod is connected with the second end of the bridge type flexible hinge, one end of the fourth hinge rod is connected with the second end of the bridge type flexible hinge, and an included angle between the first hinge rod and the second direction is larger than 45 degrees.
6. The two-axis linkage fast knife servo of claim 4, wherein a first gap is provided between the side surface of the second piezoelectric ceramic and the first driving rod, and a second gap is provided between the side surface of the second piezoelectric ceramic and the second driving rod.
7. The two-axis linkage fast knife servo of claim 4, wherein the first piezoelectric ceramic and the second piezoelectric ceramic are coaxially arranged.
8. The two-axis linkage fast knife servo according to claim 4, wherein a pressure sensor is mounted at one end of the second piezoelectric ceramic, and the pressure sensor is in contact with an end face of the second piezoelectric ceramic.
9. The two-axis linked fast knife servo of claim 8, wherein the other end of the second piezoelectric ceramic is connected to the fast knife servo carriage by a first fastener.
10. The two-axis linked knife servo of any one of claims 1-9 wherein the second direction is perpendicular to the first direction.
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| CN108262629B (en) * | 2018-03-21 | 2023-12-26 | 吉林大学 | Large-stroke high-precision two-degree-of-freedom quick cutter servo device |
| CN108747534A (en) * | 2018-08-13 | 2018-11-06 | 广州铁路职业技术学院（广州铁路机械学校） | One kind having monoblock type flexible hinge and the adjustable fast tool servo device of rigidity |
| CN109434142A (en) * | 2018-12-29 | 2019-03-08 | 苏州大学 | A kind of fast servo tool |
| CN110508996A (en) * | 2019-09-24 | 2019-11-29 | 吉林大学 | Timing control surface micro-structure array processing unit (plant) and method |
| CN110548908B (en) * | 2019-10-14 | 2024-04-12 | 吉林大学 | Gantry type coarse-fine composite five-axis precision machine tool and machining method |
| CN112388370A (en) * | 2020-11-13 | 2021-02-23 | 山东大学日照智能制造研究院 | Piezoelectric ceramic driven large-stroke constant-force fast knife servo device |
| CN113523435B (en) * | 2021-06-11 | 2023-08-29 | 苏州超徕精工科技有限公司 | Hard and brittle complex structure spindle-free multipole servo polishing device and polishing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380788A (en) * | 2011-11-08 | 2012-03-21 | 浙江师范大学 | Double-parallel-flexible-hinge-based tool rest driving platform of super-precision machining lathe |
| CN202639966U (en) * | 2012-07-17 | 2013-01-02 | 广东工业大学 | High-frequency ultraprecise processing lathe tool rest driving platform based on bridge-type flexible hinge |
| CN105252285A (en) * | 2015-11-17 | 2016-01-20 | 长春工业大学 | Piezoelectric-driven three-dimensional elliptic micro-feed motion platform |
| CN106251909A (en) * | 2016-08-19 | 2016-12-21 | 天津大学 | A kind of high accuracy, big stroke freedom degree parallel connection mini positioning platform |
| CN206732672U (en) * | 2017-04-05 | 2017-12-12 | 广州铁路职业技术学院 | The fast tool servo device of two-axle interlocking |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3792675B2 (en) * | 2003-06-05 | 2006-07-05 | ファナック株式会社 | Fine positioning apparatus and tool correction method |
-
2017
- 2017-04-05 CN CN201710217569.7A patent/CN106881618B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380788A (en) * | 2011-11-08 | 2012-03-21 | 浙江师范大学 | Double-parallel-flexible-hinge-based tool rest driving platform of super-precision machining lathe |
| CN202639966U (en) * | 2012-07-17 | 2013-01-02 | 广东工业大学 | High-frequency ultraprecise processing lathe tool rest driving platform based on bridge-type flexible hinge |
| CN105252285A (en) * | 2015-11-17 | 2016-01-20 | 长春工业大学 | Piezoelectric-driven three-dimensional elliptic micro-feed motion platform |
| CN106251909A (en) * | 2016-08-19 | 2016-12-21 | 天津大学 | A kind of high accuracy, big stroke freedom degree parallel connection mini positioning platform |
| CN206732672U (en) * | 2017-04-05 | 2017-12-12 | 广州铁路职业技术学院 | The fast tool servo device of two-axle interlocking |
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